Adrian Geoffrey Gilbert Books

Orion Mystery

By Adrian Geoffrey Gilbert, Robert Bauval

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The Holy Kingdom: The Quest For The Real King Arthur

By Adrian Gilbert

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In this explosive book, the authors show that after the Roman conquest, Britain retained its culture; its royal families intermarrying with the Caesars. There were two kings named Arthur -- one, th...

Signs in the sky

By Adrian Geoffrey Gilbert

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The new Jerusalem

By Adrian Geoffrey Gilbert

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Magi

By Adrian Geoffrey Gilbert

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Magi

By Adrian Gilbert

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World War I Armies of the Past

By Adrian Geoffrey Gilbert

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The Mayan prophecies

By Adrian Gilbert

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The Cosmic Wisdom Beyond Astrology Towards a New Gnosis of the Stars

By Adrian Geoffrey Gilbert, Adrian G. Gilbert

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Hermetica

By Hermes Trismegitus.

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.